REMOVE

1. waterfalls (natural bodies o …
2. buildings (structures)
3. 1920

WHAT

1. cliffs (1)
2. coastlines (1)
3. exterior views (1)
4. landscapes (representatio … (1)

WHERE

1. Alberta, Canada (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1945 (1)
2. between circa 1929 and ci … (1)